Mold for concrete blocks



June 26,1923.

4 E. c; B ONIGER MOLD FOR CONCRETE BLOCKS Filed March 21. 1921 3 Sheets-Sheet 1 HTTOE/VE) Juaeasima.

1 459545 E: ,c, BONIGER MOLD FDR CONCRETE BLOCKS Filed-March 21. 1921 s Sheets-Sheet 2 huge 26, 1923.

. 1,459,945, E. c. BONIGER MDLD FOR CONCRETE BLOCKS Filed March 21 1921 3 Sheets-Sheet 3 WW n 2: i? N in v mmFH Z; A E 3 S W 0 mm m. w Q *N 3 Patented June 26, l923.

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lgldddda 1 T i Q EMIL C. BONIGEB, F DAVENPORT, IOWA.

Mom: FOR Coucnnrn BLOCKS.

Application filed March 21, 1921. Serial No. 453,885.

My invention has reference to molds for concrete blocks, and has for its purpose to assist in the production of building blocks of a novel design, the use of which blocks in a wall will enhance the efficiency and durability thereof. The invention comprises a suitable base, and an outer frame or form supported thereon, which form is divided into a desired number of compartments, each of which is subdivided by a plurality of smaller forms of eccentric shape into spaces for receiving the material from which the blocks are formed. Means are also provided whereby the forms and blocks can be readily separated after the blocks have become sufciently hard, for the purpose of removing such blocks.

In the drawings Fig. 1 is a plan view of my invention, in its preferred embodiment.

Fig. 2 is a side view thereof.

Fig. 3 is a fragmentary view of the base 1, in perspective.

Fig. i is a perspective view of one of the forms 11.

Fig. 5 is an end section ofone of the partitions 9.

Fig. 6 shows one of the covers 19, in detail.

Fig. 7 is a detached view of one of the posts 5. i

Fig. 8 is a similar view ofone ofthe posts 6.

Fig. 9 is an end view of the device.

Fig. 10 shows a'series of blocks, such as i are produced by the mold, as they appear when in place in a wall.

Fig. 11 is a plan view of a modified arrangement of the invention.

Fig. 12 is an enlarged view of one of the forms 23, removed.

1 represents a base-plate, supported on any desired number of cross-pieces 2, connected with which are sockets 3 and 4, adapted to receive side posts 5 and cornerposts 6. against which are supported sideplates 7 and end-plates 8, forming a rectangular frame, which is divided into a series forations in the end plates 8.

of longitudinal compartments by means of partitions 9, provided at their ends with lugs 10 for engagement withcorresponding per- In each compartment is a plurality of, forms 11, of a modified di'amond shape, provided at their 'endswith angular extensions 12, fitted with lugs 13 for engagement with perforations 14 in the partitions 9 and similar openings 15 in the side plates 7. By this means the forms 11 are held in position in spaced-apart relations, producing spaces 16 which are designed to receive the material from which the blocks are formed. At each end of the mold the forms 11 are of irregular shape, and provided with end extensions 17 which are connected with the end-plates 8. This produces angular spaces 18., for the forma ion of corner-blocks. Each of the forms 11 is fitted with a cover 19, to, prevent the ma terial from entering such forms.

In operatiomthe forms all being in place, as shown in Fig. 1 of the drawings, the mold is filled with a mixture of cement in a semiliquid state, which mixture finds its way into all parts of the mold except to the interior of the forms 11. This results in the production of a plurality of blocks such as are illustrated at 20 in Fig. 10, with an occasional corner-block 21. hen set in a wall, as shown, these blocks will be separated by spaces 22, corresponding in shape with the forms 11. This produces a wall in which the joints are in staggered relation, with the spaces separating them, so that it is a diflicult matter for moisture to permeate the wall.

ened the posts 5 and 6 are detached and the side and end plates of the mold removed, whereupon the concrete blocks and forms 11 can be alternatelywithdrawn.

If desired, the base 1 can be mounted upon a suitable truck, for transportation of the blocks from one point to another, and two or more of the molds can be supported one above the other, and successively filled with the material.

It will be obvious that the opposite faces of the blocks which are produced in the mold will be smooth, on account of such faces being formed against the partitions 9 or side plates of the form, but if it is desired to have a rough finish on one face of lltl 2e ters Patent, is:

lar shapeybut turned edge-wisin the spaces between the partitions as shown in Fig. 1].. The forms 23 have end-pieces 24: similar to'the extensions 12 of the forms 11, which act in the same Way as separating plates. These forms are provided on their edges ith lugs 25, adapted to enter openings in the partitions, and hold-the forms in place. A longitudinal sectional view of said forms Would be similar in appearance to asingle series of the forms 11., as shown in Fig. l.

I Both ends of the forms 23 would be closed by the partitions, and the mixture would Work down between and beneath such'formg the upper face of each stone being unfinished and the upper faces of the blocks can he further desired. v I I What lclaim and desire to secu'reby Letroughenedbefore hardening, it

LA device otthe class described, coinengagement with said frame.

2. A device of the class described, co1n- "prising a base; a plurality 01": posts removablysupported at the sides and ends thereof; frame pieces removably supported by said posts, and forming arectangular mold; partitions removably connected with said frame pieces, and dividing said mold into similar compartments and a plurality of forms pro vided with extensionsadapted for detachable connection wvith I said partitions and framepieces; said forms dividing said cornpartments' into imegular spaces of a desired pattern. I

In testimony whereof I afiix my signature.

EMIL C. BONIGER. 

